Both the football club and the carmaker are controlled by the Agnelli family through their holding company.
The USB union said that the £99 million required to sign the 33-year-old player to Juventus should have been invested to safeguard the future of Fiat's future of thousands of people, "rather than enriching only one". However, with a new investment strategy in place, Fiat claims that all employees across Italy shall return to work by 2022.
Ronaldo's exit from the club came as a surprise to many, but after his move to the Bianconeri was confirmed this week, Real are focused on who they can replace him with. "The company should invest in auto models that guarantee the futures of thousands of people, rather than enriching only one".
Ronaldo joined the Italian champions in a big-money deal earlier this week, penning a four-year contract worth a reported £500,000 per week.
Behind President Trump's claim of new funding from North Atlantic Treaty Organisation members
Asked when exactly the allies would now reach their two percent of GDP target, Trump said it would be over the coming years. Germany, Europe's richest country, spends just 1.24% on defense, and it's an unpopular topic there.
He added: "The marketing leverage that Juventus will be able to create will be significant".
The auto manufacturer Fiat, to which the brand Ferrari exclusively belongs, is reportedly 29.1 percent owned by the Agnelli family, who also hold about 63.77 percent of Juventus.
It's calling for a strike at the Melfi plant in southern Italy between 10 p.m. on July 15 and 6 p.m. on July 17.
Its members will walk out at 22:00 local time on Sunday and remain on strike until 18:00 on the following Tuesday.